On Fri, 4 Sep 2009, kd4e wrote:
> There has been some discussion here about modern washing
> machines and RFI.
>
> Can anyone recommend one, please?
>
> 1. Currently on the market.
>
> 2. Front-loading (better efficiency).
>
> 3. RFI-quiet (or easily fixed).
>
> 4. Under $600.
>
> 5. Preferably Made in the USA or at least in a still-free
> country - Canada, Mexico, Taiwan, Japan, India,
> Poland, S. Korea but definitely not China.
Every direct drive variable speed washer I have listened to is RF noisy.
After noticing issues with my Kenmore I made it a point to bring the HT
and "sample" as many as possible and friends/relative/etc places.
Some had noisy control systems, all of the front loaders had noisy drive
systems.
Mine happens to have a nearly silent control system, onboard electronics
can only be picked up with a sense antenna a couple feet from the panel.
The drive system however, I could clearly hear drum start/run/reverse and
spinn cycles, easy to tell what the washer was doing 160-10.
Since every similar washer I checked was at least as bad, and mine only
had motor controller noise I ordered a Corecom filter brick, 10amp, one of
the higher end units noted for use on VFD (Variable Frequency Drive)
systems.
I installed inside the washer case where the power cord enters, almost
silent (90+ percent gone). Note, the filter *only* works when the filter
body has a very good connection to the washer chassis, leave it floating
and it makes no impact on the noise. I ground the paint off of the inside
of the chassis under the filter mounting tabs and used stainless hardware
w/ no-ox grease to get a good connection, then removed that panel and
cleaned up where the panel bonds to the base panel/frame (where motor
controller and motor casings bolt to) to ensure a good connection.
After that I could only hear it below 40 and it was weak, a 2.4in #31
toroid on the power cable and I can no longer tell when it is running.
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